# What does Min/Max aggregation mode return when using interval samples?

**URL:** <https://forum.inductiveautomation.com/t/what-does-min-max-aggregation-mode-return-when-using-interval-samples/33633>\
**Category:** Ignition\
**Created:** [April 2, 2020, 5:21pm UTC](https://forum.inductiveautomation.com/t/what-does-min-max-aggregation-mode-return-when-using-interval-samples/33633 "2020-04-02T17:21:09Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dan123](https://avatars.discourse-cdn.com/v4/letter/d/cc9497/32.png) [@dan123](https://forum.inductiveautomation.com/u/dan123)\
**Post date:** [April 2, 2020, 5:21pm UTC](https://forum.inductiveautomation.com/t/what-does-min-max-aggregation-mode-return-when-using-interval-samples/33633/1 "2020-04-02T17:21:09Z")

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The user manual indicates that Min/Max returns 2 values (min&max) for the sample window, but when using interval mode, it only returns 1 sample per interval window, and it appears to return the same value when using closest value, minimum, or maximum. In interval mode, is Min/Max basically the same as closest value? Not an issue if that’s the case, just wanted to know.

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**Author:** ![hventer23](https://avatars.discourse-cdn.com/v4/letter/h/bbce88/32.png) [@hventer23](https://forum.inductiveautomation.com/u/hventer23)\
**Post date:** [April 11, 2022, 3:14pm UTC](https://forum.inductiveautomation.com/t/what-does-min-max-aggregation-mode-return-when-using-interval-samples/33633/2 "2022-04-11T15:14:31Z")

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Bad taste to bring up an old post but I would prefer not repeating the questions. I am trying to display the hourly min max over a specified timeframe for a given tag in Ignition Reporting. Thus I am using:  
Aggregation Mode: Mix/Max  
Return Format: Wide  
Sample Size: Interval (1 Hour)

The result is always one value for the given hour and not two (Min/Max). I tested this out quickly on a normal perspective time series chart and I was getting the same issue. But changing Sample Size to “Fixed” gives me a min and max value for a given timestamp.

Why is it that Min Max using Interval sampling does not return two values for the specific interval?

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**Author:** ![sam4](https://avatars.discourse-cdn.com/v4/letter/s/b5e925/32.png) [@sam4](https://forum.inductiveautomation.com/u/sam4)\
**Post date:** [September 11, 2025, 10:41pm UTC](https://forum.inductiveautomation.com/t/what-does-min-max-aggregation-mode-return-when-using-interval-samples/33633/3 "2025-09-11T22:41:42Z")

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Haha, 5 years later and I'm trying to find an answer for this question too.

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**Author:** ![robertm](https://avatars.discourse-cdn.com/v4/letter/r/ea5d25/32.png) [@robertm](https://forum.inductiveautomation.com/u/robertm)\
**Post date:** [September 11, 2025, 11:46pm UTC](https://forum.inductiveautomation.com/t/what-does-min-max-aggregation-mode-return-when-using-interval-samples/33633/4 "2025-09-11T23:46:06Z")

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If there’s only one value in the interval, then min/max only returns one row. Also, I believe if aggregation is occurring, min/max will return a single aggregated value.